If you have a frozen screen that just keeps repeating and doesn't load, I traced mine down to a capacitor. The bad capacitor was easy to spot being a large one with bulging. It cost me 7 bucks for a new cap on Amazon and saved the 300 I spent buying the unit used. Unplug the thing and don't shock yourself with capacitors that stay charged even unplugged but a relatively easy fix can be done with minimal skill if money is tight.
